The Android and iOS operating systems have special codes that allow the user to access the information and hidden functions of the device. They are called MMI and here are some of the most useful codes.
Android
If you have an Android device, the following codes will help you unlock hidden menus:
- * # 0 * # – information and tests menu
- * # * # 4636 # * # * – device information, usage and battery statistics
- * # * # 273282 * 255 * 663282 * # * # * – backup files
- * # 12580 * 369 # – information about hardware and software
- * # * # 3264 # * # * – information about RAM memory
- * # * # 7262626 # * # * – start safe mode
- * # * # 7780 # * # * – restore to factory settings without data formatting
- # 5376 # – delete all messages
iOS
In case you have an iPhone, here are these secret codes:
- * 3001 # 12345 # * – start test mode
- * 3370 # – activate call quality improvement mode
- * # * # 34971539 # * # * – show camera info
- # 31 # + phone number – make a call to the number indicated with hidden number
- ** 62 * number # – divert all calls to another number if your iPhone is off
- * # * # 232337 # * # – show Bluetooth address
- * # 5005 * 7672 # – SMS center number
- * 777 # – check the balance of a prepaid account
Some experts have advised that MMI codes also have certain disadvantages: in particular, they can give errors or restart the device.